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公开(公告)号：US20240010944A1
公开(公告)日：2024-01-11
申请号：US18036192
申请日：2022-01-10
Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Inventor： Bin LIU , Yongming CHAI , Chenguang LIU , Yuan PAN , Yichuan LI , Kongyuan ZHANG , Yunqi LIU
IPC: C10M175/00 , B01J31/02 , B01J37/04 , B01J37/20 , C10G67/14
CPC classification number: C10M175/0016 , C10M175/0058 , B01J31/0239 , B01J37/04 , B01J37/20 , C10G67/14 , C10N2060/02
Abstract: A method for hydrotreating and recycling waste lubricating oil, the method comprising the two steps of slurry bed pre-hydrotreatment and deep hydrotreatment, specifically as follows: mechanical impurities are removed from waste lubricating oil, and then the oil is subjected to flash distillation to separate free water and a portion of light hydrocarbons; a bottom product of the flash distillation column is mixed with hydrogen and a self-sulfurizing oil-soluble transition metal catalyst, and then enters a slurry bed reactor for pre-hydrotreatment; a liquid product obtained by performing separation on a reaction effluent is subjected to hydrocyclone separation and solvent washing to remove solid residue, and then a pre-treated lubricating oil component is obtained; said component is mixed with hydrogen and then enters a hydrofining reactor, an isomerization-dewaxing reactor, and a supplementary refining reactor, connected in series, for hydrotreatment; and the reaction products are separated to obtain high-quality naphtha, diesel oil and a lubricating base oil. The method of the present invention has such advantages as simple processing procedures, a high oil liquid yield, good lubricating oil base oil quality, and can implement full-fraction resource utilization of waste lubricating oil. In addition, the oil-soluble catalyst features simple dispersion, no need for vulcanization, a small catalyst adding amount, high low-temperature hydrogenation activity, is capable of effectively preventing the coking that could occur during a process of preheating the waste lubricating oil, and ensures long-term stable operation of the device.
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公开(公告)号：US20230416636A1
公开(公告)日：2023-12-28
申请号：US18036199
申请日：2022-01-10
Applicant: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Inventor： Bin LIU , Yongming CHAI , Chenguang LIU , Yuan PAN , Yichuan LI , Kongyuan ZHANG , Yunqi LIU
CPC classification number: C10M175/0016 , C10M175/0041 , C10M175/0058 , B01J31/0271 , B01J37/04 , B01J37/20 , C10G49/04 , B01D3/06 , B01D53/0423 , B01D21/267 , B01J2531/64 , B01J2531/847 , B01J2531/0211 , B01J2231/645 , C10N2060/02
Abstract: The present invention relates to a pre-hydrotreatment and purification method for waste lubricating oil, the method comprising the following steps: mechanical impurities are removed from waste lubricating oil, and then the oil is subjected to flash distillation to separate free water and a portion of light hydrocarbons; a bottom product of the flash distillation column is mixed with hydrogen and a self-sulfurizing oil-soluble transition metal catalyst, and then enters a slurry bed reactor for pre-hydrotreatment; a gas product obtained by performing separation on a reaction effluent is subjected to adsorption purification and then enters a hydrogen recycle compressor for cyclic use; a liquid product obtained by performing separation on a reaction effluent is subjected to hydrocyclone separation and solvent washing to remove solid residue, and finally a purified lubricating oil component is obtained. The method of the present invention has such advantages as simple processing procedures, a high non-ideal component conversion rate, a high oil liquid yield, and good quality. In addition, the oil-soluble catalyst features simple dispersion, no need for vulcanization, a small catalyst adding amount, high low-temperature hydrogenation activity, and is capable of effectively preventing the coking that could occur during a process of preheating the waste lubricating oil, markedly extending the operational lifespan of a waste lubricating oil hydrogen treatment device.
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公开(公告)号：US20240368459A1
公开(公告)日：2024-11-07
申请号：US18031360
申请日：2022-07-28
Applicant: CHINA UNIVERSITY OF PETROLEUM, EAST CHINA
Inventor： Yanling WANG , Chuanbao ZHANG , Lei LIANG , Bin LIU , Longhao TANG , Jincheng GONG , Ning XU
IPC: C09K8/68
Abstract: A guar gum fracturing fluid gel and a guar gum fracturing fluid system with reduced pH dependence, a preparation method and an application thereof are disclosed. The fracturing fluid gel includes 0.01-0.2% of nanomaterial, 0.1-0.5% of guar gum, 0.1-0.5% of organic boron-titanium crosslinker and a remaining amount of water. The fracturing fluid gel is more stable in network structure, tolerant of different temperatures and has good shear resistance. A preparation method and an application of the fracturing fluid gel are also provided. In the guar gum fracturing fluid system, the dependence on pH level is reduced, thereby alleviating the damage caused by a high pH value to a reservoir.
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4.发明公开公开(公告)号：US20230391959A1
公开(公告)日：2023-12-07
申请号：US18025666
申请日：2022-07-28
Applicant: CHINA UNIVERSITY OF PETROLEUM, EAST CHINA
Inventor： Yanling WANG , Bin LIU , Baojiang SUN , Lei LIANG , Di LI
Abstract: A preparation method for and an application of a modified siloxane-based supercritical carbon dioxide thickener are disclosed. The method includes the following steps: using 1,3-diallyl-1,3,5-triazine-2,4,6-trione as a polymerization monomer, and dropwise adding 1,3,5,7-tetramethylcyclotetrasiloxane for hydrosilylation in the presence of a catalyst to obtain a modified siloxane polymer. The obtained modified siloxane polymer is directly used as a supercritical carbon dioxide thickener without purification post-treatment; when in use, the modified siloxane polymer is prepared into a solution with a concentration of 1-2%, has an excellent thickening effect with no cosolvent required, and has high solubility in carbon dioxide and high temperature resistance.
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